Film gate for motion picture cameras



y 2, 3 G. LOWKRANTZ' 1 5906331 FILM GATE FOR MOTION PICTURE CAMERASFiled May 20, 1929 INVENTOR. 6mm: 1. ow/m/wrz.

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30 on the line 2-2 of Figure 1.

- picture cameras, the

Patented May 2, 1933 UNITED STATES PATENT-O ICE GUNNE LOWKRA'NTZ, OFIBINGHAMTON, NEW YORK, ASSIGNOB T AGFA ANSCO CORPORATION,

OF BINGHAMTON, NEW YORK FILM GATE FOB MOTION PICTURE CAMERAS Applicationfiled Kay 20, 1929. Serial 1T0. 864,583.

My invention relates to a film gate for motion picture cameras and hasfor its primary object the provision of a film tensioning member adaptedto resiliently engage and hold the motion picture film in flat relationto the e osure station of a camera and which meiiiber is readily andeasily displaced with respect to such film and station in order that thefilm may be easily and quickly threaded therethrough for startin Oneobject of m invention'is to provi e such afilm gate which is normallyresiliently urgedinto engagement withthe film but which may be moveddownwardly and outwardly against the tension of its springs to permitthe ready insertion of the film, and which upon release willautomatically return to its normal film engaging position.

Other objects and advantages in details will be apparent as referencenow being the accompanying of this application and wherein likereference numerals indicate like parts.

In the drawing Figure 1 is. a detail side view of the film gate andortion of the camera with which said gate is associated.

Figure 2 is a detail had to the figures of sectional view taken Theillustration herein is more or less diagrammatic inasmuch as theinvention resides in the film ate which is adapted for use in manydesigns and types of motion 'details of which have no relation to thisinvention and have, not

therefore been shown in detail.

It may be assumed that the reference character 1 refers to a portion ofthe casing of a motion picture camera provided with the usual mounting 2for lens and shutter and film movingapparatus Feed sprockets 3 and 4 areprovided for feeding the film 5 to the exposure station located withinthe I casing 2 and to the intermittent film moving mechanism therein andnot shown. Sprocket 3 tends to feed the film to such'mechanism fromasuitable source of'supply and the sprocket 4 serves tofeed the film awayfrom such mec a ism to a u table take up through which the descriptionproceeds, I

drawing forming a part away from t reel. The film 5 is properly loopedas at 6 before entering and after leaving thefilm gate and exposurestation, to permit easy intermittent movement Suitably mounted upon thecamera as by adjacent but spaced from screws 7 at a point therethrough.

the housing 2 is an angular bracket 8, a

vertical side 9 of which is provided with two elongated recesses oropenings 10 11 carry at their inner pad 12 adapted the film 5 as itpasses extend the pins 11. The pins ends a fiat presser to engage therear side of through the guided path provided for it in the rear of thehousing 2. Coil springs 13 between the flange encircle the pins 11 9 ofthe bracket and the presser pad 12 and tend to normally urge the presserpad into {resilient engagement with the film 5. 1

The opposite ends of the pins 11 extending through the openings 10 carrya finger piece 14 suitably ing wardl or to the right secured thereto andservas a means for pulling the pins outin Figures 1 and where y thepresser pad 12 may be pulled provided at 15 serving as a. bearingmounted upon which is in such manner as to he film path. The bracket 8is each end with upstanding ears for a. plntle 16 coiled spring 17,

finger piece 14 normally hold the same and the pins 11 upwardly the fulllimit of the openings 10 1 such position, tical position the presser padfor full engagement throughn the flange 9. In

12 1s in verout its width and length with the film 5. Pressingdownwardly upon the finger piece 14, however, against the tension of thespring 17 openings will lower the pins 10 in the flange 9 and permit the11 within the presser pad 12 to assume the position shown in dottedlines in Figure 2. This provides a relatively large space pad and thefihn gate or guide at the upper greatly facilitates the edge thereof andbetween the presser threading of the film through the camera.

Naturally also moved to the right in the finger piece 14 may be Figures1 and 2, thus further separating the presser pad 12 from the film guidewhereby the fi m 5 may be I scope of my invention. I

' ings through which said pins moved away from quickly and easilythreaded through the camera past the exposure station. With the film sothreaded, the release of the finger piece 14 results in the coil spring17 returning the presser pad to normal vertical position and the suchpresser pad into flat engagement with the film 5.

Of course, changes ma be made' in details of construction an arrangementof parts without departing from the spirit and do not limit In self,therefore, to the exact structure herein shown and described other thanby the appended claim.

I claim:

In combination with a film gate, a presser pad ada ted for normal flatengagement with a fiIm in saidv gate, pins on said pad, a bracketprovided with elongated openextend, whereby said pad may be pivotallyand slidably film en 'ng position and resilient means for resisting saidpivotal and sliding movements.

In testimony whereof, I afiix my signature.

GUN N E LOWKRANTZ.

springs 13 moving

